Solar energy is more popular for homeowners due to the fact that the cost of solar panels has fallen in the last decade. Adding a solar energy system to your roof can be difficult.

Workers installed a solar and battery system at my home. It was a major investment but has already begun paying off in lower utility bills and providing peace of mind that we will have at least some electricity during power outages, which are common here because storms often knock down power lines.

As energy prices rise and concerns about climate change mount, interest in rooftop solar systems is high. Many people are worried about the effects of climate change. 6 percent of Americans have already installed solar panels, and another 46 percent are considering it, according to a survey.

In places like New York City and Boston, where it is more expensive than in the suburbs, solar is a lot cheaper.

There are some things to consider if you are interested in solar.

Finding the answer to this question can be difficult. I was told by an installation that solar panels wouldn't generate enough electricity to make the investment worthwhile because my roof was shaded by trees. The installer I hired allayed those concerns and recommended some tree trimming. My family uses less power on sunny days than I do.

It can be hard to find out what your local government will allow because the information is not readily available in plain language. At my previous home, I learned that lesson.

It took months of research to find out that I couldn't install panels on my roof. It turns out that the city requires a large clear area on flat roofs for firefighters to walk on. I couldn't install solar panels on a canopy because it would violate a city height restriction for homes on my block.

The best way to get to know as many solar installers as possible is to cast a wide net. People in many parts of the country have banded together to purchase solar panels in order to secure lower prices from installers.

"That has been really successful in neighborhoods and communities all across the country," said the community solar manager at Solar One.

ImageWorkers installing solar panels on a Brooklyn rooftop.
Workers installing solar panels on a Brooklyn rooftop. Credit...Karsten Moran for The New York Times
Workers installing solar panels on a Brooklyn rooftop.

You should ask for proposals from several people. It's easy to contact multiple installers with comparison shopping services.

The system's cost per watt is a good indicator of how much the system will cost. You can compare offers if you know how much you are paying for the system's electricity-generating capacity.

The average price for a new rooftop solar system is $2.75 per watt. That works out to $26,125 for an average system of 9,500 watt before taking into account a federal tax credit. The tax credit for solar system costs is 26 percent of the cost in the tax year of 2022. Incentives to install solar systems are offered by many states, including Arizona, California, New York and Massachusetts.

Local labor costs, location, and other factors can affect prices greatly. If your roof is old or damaged, it might need to be replaced before a solar system can be installed.

Depending on electricity rates, how much energy a home uses and state policies, rooftop solar systems can reduce monthly utility bills. Buyers will be able to recover their investment faster if systems save more money. The founder of EnergySage said solar systems should pay for themselves within 10 years.

The excess electricity that rooftop systems produce is sent to the electric grid, and utilities typically compensate homeowners for that energy through credits on their monthly bills. The value of credits varies by state.

If you can afford to pay cash, you will get the best deal. Over the life of the contract, systems purchased with loans tend to cost more. Shopping around can help you avoid falling prey to predatory agreements.

Your costs are usually fixed for the duration of the contract when you lease a solar energy system. It can be difficult to get out of a lease when you sell your home, because buyers might not want to take on your contract.

For people who may not earn enough to claim the federal tax credit, it makes sense to lease. He suggested that people get quotes from different companies.

Adding a battery to your solar system will allow you to store some of the excess electricity you generate. A solar system without a battery won't keep you supplied with power during an outage because most residential systems are turned off when the grid goes down.

If you want to run large appliances and provide power for many hours or days, batteries can be expensive. A 10- to 12-kilo watt-hour battery, which can store roughly a third of a home's typical daily electricity use, costs $13,000.

The federal tax credit for rooftop solar systems only applies to the costs of batteries that are purchased with solar panels, and not to batteries added in a different tax year. The percentage of residential solar systems with batteries has increased from 20 percent in 2020 to 28 percent in 2021.

The New York Times has a guide for buying solar and battery systems.

Electric cars can't provide power. Only a few models, like the Ford F-150 Lightning and theHyundai Ioniq 5, have that ability, and they are in short supply.

Many energy experts believe that it will be common for car batteries to send power back to homes and the electric grid in the future.

In many parts of the United States, there are only occasional power failures. It may not make sense to invest in an expensive home battery, which usually holds less energy than an electric-car battery.

Community solar projects are usually installed on open land or on the roofs of warehouses and other large buildings.

Community solar programs work in the same way. One bill is from the community solar project and the other is from the utility. The projects sell electricity at a discount to the rate charged by your utility, and each kilowatt-hour of power you buy shows up as a credit for a kilowatt-hour of energy on your utility bill.

It doesn't cost anything to join a community solar project in New York.

The majority of community solar projects are in four states: Florida, Minnesota, New York and Massachusetts.